Process for production of intermetallic compound-based composite material
AssigneeNGK Insulators, Ltd.
InventorMasahiro Kida
Life of this patent
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Abstract
There is provided a process for producing an intermetallic compound-based composite material containing a reinforcing material and an intermetallic compound. The process includes infiltrating a metal powder into the gaps of a reinforcing material to form a preform and impregnating the preform with an Al melt to give rise to a spontaneous combustion reaction between the metal powder and the Al melt to convert the Al melt into an aluminide intermetallic compound. The Al melt and the metal powder are used in such amounts that they do not remain after the spontaneous combustion reaction. The process can produce an intermetallic compound-based composite material of large size and complicated shape in reduced steps.
Claims20
A process for producing an intermetallic compound-based composite material comprising a reinforcing material and an intermetallic compound, comprising the steps of:
- mixing a metal powder with a reinforcing material to obtain a mixed powder, filling the mixed powder into a vessel, placing Al on an upper side of the mixed powder filled into the vessel, heating the Al and the mixed powder under reduced pressure to a temperature that is several tens of ° C. higher than the melting point Al, and impregnating the mixed powder with an Al melt, wherein a spontaneous combustion reaction between the metal powder and the Al melt to convert the Al melt into an aluminide intermetallic compound, and the Al melt and the metal powder are used respectively in such amounts that a mass ratio of a remaining Al after the spontaneous reaction to the intermetallic compound-based composite material is within a range from 0:10 to 3:7, and wherein reinforcing material particles are dispersed within the intermetallic compound-based composite material.
A process for producing an intermetallic compound-based composite material comprising a reinforcing material and an intermetallic compound, comprising the steps of:
- mixing a metal powder and an oxide powder reducible by Al with a reinforcing material to obtain a mixed powder, filling the mixed powder into a vessel, placing Al on an upper side of the mixed powder filled into the vessel, heating the Al and the mixed powder under reduced pressure to a temperature that is several tens of ° C. higher than the melting point Al, and impregnating the mixed powder with an Al melt, wherein a spontaneous combustion reaction between the metal powder and the Al melt converts the Al melt into an aluminide intermetallic compound, and the Al, the metal powder and the oxide powder are used respectively in such amounts that a mass ratio of a remaining Al after the spontaneous reaction to the intermetallic compound-based composite material is within a range from 0:10 to 3:7, and wherein reinforcing material particles are dispersed within the intermetallic compound-based composite material.
Dependencies are inferred from the claim text.